Henry farmer



(No Model.)

H. P'ARM'ER. PAWL AND RATGHET MECHANISM. No. 423,232. Patented Mar. 11,1890..

N. PETERS, Photu-Llthugrnphor. Washington. nv

UNITED STATES PATENT OF ICE.

HENRY FARMER, OF RICHMOND, INDIANA, ASSIGNOR OF ONE-HALF TO FINLEYNEWVLIN, OF SAME PLACE.

PAWL-AND-RATCHE'I' MECHANISM.

SPECIFICATION forming part of Letters Patent No. 423,232, dated March11, 1890.

Application filed December 26, 1889. Serial No. 334,986. (No model.)

To all whom it may concern.-

Be it known that I, HENRY FARMER, acitizen of the United States,residing at Richmond, in the county of \Vayne and State of Indiana, haveinvented certain new and use ful Improvements in Pawl-and-RatchetMechanism, of which the following is a specification.

My invention relates to clutches, and has reference more particularly tothat class of devices designed for use upon lawn-mowers, thoughapplicable to other machines.

In the drawings, Figure 1 is a perspective view of a gear-wheel andshaft, showing my invention applied thereto, Fig. 2, a perspective viewof the parts separated; Fig. 3, a

longitudinal sectional view; Figs. 4 and 5., sectional views on thelinew m, Fig. 3, showing the parts in different positions; Fig. 6, aface or end view of the pinion, and Fig. 7 a similar view of the hub ofthe pinion.

A indicates a shaft; 13, a pinion mounted loosely thereon, and C the hubof the pinion, also mounted loosely upon the shaft, but made separatefrom the main body of the pinion. Pinion B has two or morelaterallyprojecting arms or flanges a a, while the hub O has similararms or flanges b b, which are adapted to engage or interlock with thoseof the pinion. The pinion and the hub are both recessed on theiropposing faces, so as to form in each one or more abrupt shoulders 0,one or more inclined faces cl, and one or more plain faces 6, as shownin Figs. 2, 4, 5, 6, and 7, the faces (Z c of the pinion and its hubforming, in efiect,'a way or channel), as shown by dotted lines in Fig.3, with the abrupt faces or shoulders c of one at right angles to thoseof the other.

D indicates a pawl or dog having a stem g passing through the shaft anda head It to work within the way or channel j", the head It being actedupon alternately by the inclined faces of the pinion and its hub.

WVhen the pinion and its hub turn upon the shaft in the directionrepresented by the an rows in Fig. 4, the head of the pawl or dog willbe thrown alternately to one side and the other by the inclined faces ofthe hub and pinion, the shaft remaining stationary during the rotationof the pinion and hub. When, however, the direction of rotation isreversed, as indicated by the arrows in Fig. 5, one of the abrupt facesor shoulders of the hub or the pinion will comeinto contact with the endof the head h of the pawl and lock the said pinion and hub to the shaftand cause the parts to rotate or turn together. The laterally-projectingarms or flanges a 1) completely inclose and protect the pawl from dirt,&c. The number of the arms ab and faces or shoulders 0 (Z may obviouslybe varied considerably without departing from my invention.

Shaft A is provided with a shoulder 1', by means of which and a pin jpassing through the shaft the pinion and hub are held in properposition. v

The device herein shown and described is simple and effective inoperation, besides behaving a detachable hub C, said pinion and hubbeing mounted loosely upon the shaft and provided with a channel f ofsubstantially the form shown to receive the head of the pawl.

2. In combination with shaft A, a pawl D, and a pinion B, provided witha detachable hub C, said pinion and hub being mounted loosely upon theshaft and provided with a shoulder to engage the pawl only when movingin one direction.

3. In combination with shaft A and pawl D, carried thereby, pinion B,recessed on one face, as shown, and provided with a lateral flange a,and hub C, also recessed on one face and provided with a flange toengage the flange of the pinion.

l. In combination with a pinion and its hub, provided with a channel f,having an inclined face (1 and a shoulder c, a shaft and a pawl having acylindrical stem g and also a head It to work in the channel.

5'. In combination with a shaft A, provided with a shoulder '5, a pawlD, a pinion B, and detachable hub O, a way or channel formed in the huband pinion to receive the pawl, and a pin j, applied to the shaft.

In witness whereof I hereunto set my hand in the presence of twowitnesses.

HENRY FARMER.

Witnesses: i

A. L. MOMEANS,

WM. P. 000K.

